WO2009092378A2 - Dispositif d'échantillonnage et procédé d'échantillonnage - Google Patents

Dispositif d'échantillonnage et procédé d'échantillonnage Download PDF

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Publication number
WO2009092378A2
WO2009092378A2 PCT/DK2009/000018 DK2009000018W WO2009092378A2 WO 2009092378 A2 WO2009092378 A2 WO 2009092378A2 DK 2009000018 W DK2009000018 W DK 2009000018W WO 2009092378 A2 WO2009092378 A2 WO 2009092378A2
Authority
WO
WIPO (PCT)
Prior art keywords
sampling
cup
product
sampling cup
opening
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/DK2009/000018
Other languages
English (en)
Other versions
WO2009092378A3 (fr
Inventor
Thomas Kniep JØRGENSEN
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Source Technology ApS
Original Assignee
Source Technology ApS
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Source Technology ApS filed Critical Source Technology ApS
Priority to DK09704005.9T priority Critical patent/DK2243015T3/da
Priority to EP09704005A priority patent/EP2243015B1/fr
Priority to US12/863,541 priority patent/US8141418B2/en
Priority to AT09704005T priority patent/ATE520014T1/de
Publication of WO2009092378A2 publication Critical patent/WO2009092378A2/fr
Publication of WO2009092378A3 publication Critical patent/WO2009092378A3/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N1/00—Sampling; Preparing specimens for investigation
    • G01N1/02—Devices for withdrawing samples
    • G01N1/10—Devices for withdrawing samples in the liquid or fluent state
    • G01N1/20—Devices for withdrawing samples in the liquid or fluent state for flowing or falling materials
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01G—WEIGHING
    • G01G15/00—Arrangements for check-weighing of materials dispensed into removable containers
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01G—WEIGHING
    • G01G17/00—Apparatus for or methods of weighing material of special form or property
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01G—WEIGHING
    • G01G21/00—Details of weighing apparatus
    • G01G21/22—Weigh pans or other weighing receptacles; Weighing platforms
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N9/00—Investigating density or specific gravity of materials; Analysing materials by determining density or specific gravity
    • G01N9/02—Investigating density or specific gravity of materials; Analysing materials by determining density or specific gravity by measuring weight of a known volume

Definitions

  • the present invention concerns an apparatus and a method for sampling from a product flow, where the sampling is performed continuously and where the product is collected in a cup for determining physical conditions, for example weight in relation to volume, and where the cup is emptied after ending the sampling.
  • sampling e.g. measuring density of products, such as e.g. expanded and heat treated products, but also of other products where the products appear with a certain porosity during the manufacturing process, and where the product is desired to be continuously weighed in order thereby to regulate the processes controlling the expansion and thereby the porosity of the weighed product.
  • Density measurement is presently performed in various ways. Systems based on a specifically defined volume which is filled with products and weighed subsequently is the most widely used technique. This technique is frequently used at a purely manual level, where a process operator manually fills a tared container with a known volume with products. The container is often a traditional household measuring glass with closed bottom which is overfilled with product and subsequently levelled at the top such that the defined volume is completely filled with products. Subsequently, the container is weighed and the weight of the product in the defined volume may thereby be determined. This method of determining the density of a given product is used in production processes within many different industries, such as e.g. processes for making food for animals, breakfast cereals, snacks, metal powder, fertiliser, wood and plastic.
  • the process parameters can be changed such that the texture of the given product is changed, entailing a change of the density of the product as well.
  • a given product will frequently have a specific volume which is intended. This may e.g. be in connection with filling of bags of a given product where a given density of a product is wanted in order thereby to fill a ready packing optimally.
  • the characteristic of the product can be changed and thereby also the density of the product.
  • a process operator will therefore continuously check the density in order thereby to regulate the process if the density deviates from the specified value.
  • the best known prior art for density weighing is based on a sampling cup with a closed bottom.
  • the sampling cup is mounted on an arm which may be displaced horizontally and which is mounted on a weighing cell.
  • the sampling cup is moved into a give product flow whereby the cup is (over)filled with product.
  • the cup is retracted to the weighing area, the sampling cup is scraped clean at the top in order to provide a defined volume of the product to be weighed.
  • the cup is turned such that the product is emptied from the sampling cup.
  • the sampling cup with closed bottom. Density measurement of hot pellets, which the product is often, though not limited to, is a result of the heating process by which the temperature of the product immediately before density measurement will often be about the boiling point of water. The density in the manufacturing process is flexible and easily influenced. By collecting a given sample for measurement, a condensation of vapour will start during collecting in the cup. The product as well as dust and crumbs will stick to the cup at the emptying. After some time, deposits will appear in the sampling cup which will cause that the presumed volume in the sampling cup used for collecting the product will be reduced, and the weighing result is thereby not accurate any more. Attempts of cleaning the sampling cup, either with compressed air or rotating brushes, have not appeared to be sufficiently effective.
  • Scraping the sampling cup is an essential part of the system. The more homogenous scraping of the sampling cup is, the more precise weighing. As the prior art has a closed bottom, it is required with a large diameter in order to achieve a reasonable volume for the product, at the same time generating a large scraping area and thereby fluctuating measuring results. In general, the best weighing result is achieved by the largest possible volume and the smallest scraping area in the sampling cup. Since the products are often hot and sticky, scraping of the sampling cup can imply that large lumps are entrained, causing large deviations in the weighing result.
  • Hygiene is essential in manufacturing processes for products forming part of the food chain. Since cleaning cannot be done efficiently by the prior art, either by the product flow or in other mechanical ways, a hygiene problem arises whereby bacteria cultures as e.g. salmonella can appear.
  • the installation height of a given density measuring apparatus is very critical as many processing plants have very little spacing between two processing machines available.
  • the prior art is very space consuming due to the technical embodiment, where compensation is made for the design of the sampling cup with closed bottom by increasing the diameter and the height, respectively, and large changes in the processing plant are therefore required, if possible at all.
  • the invention concerns an apparatus and a method for sampling from a product flow, where the sampling is performed continuously and where the product is collected in a cup for determining physical conditions, for example weight in relation to volume, and where the cup is emptied after ending the sampling.
  • the apparatus according to the invention is provided with at least one sampling cup, where the cup is provided with a filling opening with a cross-sectional area and with an emptying opening with a different cross-sectional area, respectively. It is thus a sampling cup where the product is not emptied by the same opening through which it is filled.
  • An apparatus according to the invention may therefore designed in a simple and reliable way as it is not necessary to perform a turning movement of the sampling cup in order to empty it.
  • a method for sampling according to the invention includes at least steps where a sampling cup is introduced in a product flow whereby the cup is filled, where the sampling cup is withdrawn, scraped in level and weighed, where the sampling cup is emptied by opening the bottom and subsequently cleaned with open bottom, after which the bottom is closed and the system is ready for the next weighing. Emptying of the cup is preferably effected in the product flow, but may also occur in a separate duct intended therefor.
  • the apparatus includes at least one cup, where the cup is provided with an opening bottom, preferably a sliding bottom.
  • an opening bottom By using an opening bottom, the weighed product may easily be emptied in the product flow, and by a sliding bottom is achieved a particularly advantageous solution where possible deposits of the product on the bottom are scraped off by sliding the bottom.
  • a further embodiment of an apparatus for sampling according to the invention is in a preferred form provided with a filling opening of the cup that has a cross- sectional area which is less than the cross-sectional area of the emptying opening.
  • the apparatus may be provided with a compressed air device for cleaning the interior of the cup. Possible residues in the form of dust or crumbs of the product may thus be removed from the sampling cup.
  • the method for sampling from a product flow according to the invention may advantageously be with a step wherein the sampling cup is cleaned by compressed air, but is preferably provided with a step where cleaning is effected by means of the product flowing through the open cup. The cleaning is thus effected by products scraping against the surface in the cup with the open bottom.
  • the new invention is has been found that by means of several process independent technical solutions there may be provided an accurate and continuous measurement of the density of the product. It has been found that by making a bottomless sampling cup it may be avoided that products and dust particles accumulate at the bottom of the sampling cup. By having a bottomless sampling cup, the product flow may thereby be used as cleaning medium for the cup during emptying. By supporting the bottomless sampling cup during emptying, one may still measure a product weight in a controlled volume without risk of accumulating foreign bodies that reduce the weighing result. Also, it has been found that by making a bottomless sampling cup, the design of the cup can be made such that a minimal scraping area occurs. By e.g. making a smaller diameter at the top than at the bottom, a very small scraping area is attained, considerably improving the weighing accuracy and the repeatability.
  • a such exact weighing result may be achieved that it is immediately usable for regulating the process parameters used in the process for making the weighed products, e.g. for regulating a heat treatment process.
  • the producer of a given product may thereby ensure that the declaration of contents is followed exactly with regard to density.
  • the hygiene of the process for density measurement will be substantially improved as the system is self-cleaning, since the product flow will prevent local areas at which the product can accumulate and bacteria cultures be formed. Due to the bottomless sampling cup, a large volume is attained at a small height, simultaneously improving the possibilities of installing the system between the product processes.
  • An apparatus and a method for sampling in a product flow may furthermore include determination of the density of a "stamped" product, after which the comprimation index of the product can be determined.
  • Determining the stamped density of a product is traditionally determined by taking a product sample manually in a measuring glass with a given volume. The density may then be determined by manual weighing, or the density is alternatively determined via a sampling cup with a well-defined volume which is introduced in the product flow and weighed afterwards. The sample is then vibrated, and the product compacted or "stamped" hereby, and finally the density of the stamped product may be determined by manual reading of the stamped volume which now may be put in relation to the weight of the sample. This process is manual and resource- demanding and may advantageously be substituted by a new automatic process.
  • This new process is in principle independent of the design of the automatic sampling equipment itself and therefore not limited to sampling cups with e.g. conical sides, but may be used for all thinkable embodiments of sampling cups, when only these can take out a sample with a constant and well-defined volume.
  • a sample is taken with an apparatus as mentioned above and which furthermore is equipped with means for compacting or stamping of the contents in the filled sampling cup.
  • These means may e.g. impart a mechanical action on the sampling cup and possibly constituted by a known type of vibrator/oscillator which is mounted in connection with the sampling cup.
  • the volume of the sample can be determined by camera reading of e.g. a scale on the sampling cup. Alternatively, the volume can be determined via telemeter which is used for determining how far the product has sunk into the sampling cup.
  • the density of the product as well as the stamped density may be determined rapidly without using staff to perform a protracted manual measurement.
  • Stamping may, as mentioned, advantageously be effected by providing the apparatus according to the invention with a vibrator/oscillator of suitable type.
  • the vibrator may advantageously be arranged such that at least the sampling cup is vibrated. This vibration may in principle be initiated at the same moment as the sampling cup is withdrawn from the product flow or when a lid is put on the filling opening in the sampling cup.
  • the frequency by which "stamping" is performed may be adapted individually to various products, and similarly the time of "stamping” may be regulated such that a desired result is achieved.
  • a further advantage of an apparatus according to the invention which may perform a density determination of a "loose" product sample as well as of a "stamped" product sample is that the results of the performed measurements may immediately be used as regulating parameters for the preceding process or processes as well as for one or more succeeding processes.
  • a much better and not the least more rapid regulation of respective parameters may hereby be achieved in that regulation can be performed immediately after ending density determination, without having to do a manual process before regulation.
  • regulation can be performed much more often, as in principle density determination can be performed continually - one after another - and the results may instantaneously be introduced to a continuous regulation.
  • the measured values for the densities may e.g. be expressed as analogous signals of 4-20 mA which immediately can be used as input in various process regulating systems.
  • a further advantage of measuring the "stamped" density in connection with a sampling cup is that simultaneously a water measurement of the sample can be done. Such a measurement is typically performed with microwave equipment and the measuring accuracy is much more exact in a stamped sample than in a loose sample. Also, the more exact measurement of the water content in a sample may be used for regulating preceding and/or subsequent processes. Again, the great advantage that rapid regulation can be effected is achieved, and thereby greater certainty that the process is running as expected and that the quality of the product maintains the desired quality. Processes where the measured data can be used for regulation may e.g. be drying and/or cooling, but other processes may be controlled and regulated as well on the background of the measured densities and the water content of the product.
  • Fig. 1 shows a sectional view of a sampling apparatus from the side and mounted on a channel section with a product flow.
  • Fig. 2 shows the apparatus in various positions.
  • Fig. 3 shows examples of different designs of sampling cups.
  • the invention concerns a system which can be mounted at any place in a manufacturing process for diverse products where e.g. a density determination may be of interest.
  • the density measurement according to the invention is developed with regard to a more optimal design which will facilitate cleaning of the sampling cup and while at the same time the scraping off of the product may be substantially reduced in order thereby to improve the weighing result.
  • other measurements may be performed in the sample taken by the sampling cup, whereby a plurality of physical conditions of the product may be determined and used as regulating parameter.
  • Fig. 1 the system 1 which consists of a weighing cell 2 mounted on a first actuator 3 which is displaceable back and forth in horizontal direction. On the weighing cell 2, an arm 4 is mounted on which a further actuator 5 is fitted. In connection with the actuator 5, a sampling cup 6 is mounted in the form of a piston in which is provided a hole 7 for filling the product 8.
  • the system 1 furthermore appears mounted on a channel section 9 into which a flow of product fall.
  • the sampling cup 6 is moved into the product flow 8 whereby the product 8 fills the cup 6.
  • the sampling cup 6 is made without a bottom and consists of a cylindric, conical or other geometrically designed hole 7 without a bottom.
  • the arm 1 By supporting the sampling cup 6 by the arm 1, whereby the latter acts as bottom for the sampling cup 6, the cup 6 is filled without the product 8 falling out of the bottom.
  • the first actuator 3 is horizontally displaced to its initial position, and excess material filled in the cup 6 is scraped off by scraper 10.
  • the sampling cup 6 is displaced horizontally again by means of the first actuator 3.
  • the second actuator 5 is activated such that the sampling cup 6 is displaced again in relation to the arm 4.
  • the bottom in the sampling cup 6 is thereby opened and the weighed product 8 flows out.
  • the product flow 8 falling by the force of gravity will simultaneously clean the cup 6 from above. This is only effected in that the surface in the hole 7 is touched by the product flow 8.
  • the sampling cup is horizontally displaced via the first actuator 3 again while the second actuator 5 is still in the extended position.
  • the sampling cup 6 is thus still horizontally displaced from the arm 4 and therefore with open bottom and free passage through the hole 7.
  • a compressed air nozzle 11 is activated, whereby compressed air blows possible particles out of the sampling cup 6.
  • Possible dust particles are discharged through discharge pipe 12 under the system 1.
  • the second actuator 5 is horizontally displaced whereby the sampling cup 6 is again supported by the arm 4.
  • the weighing result is reset.
  • FIG. 2 appears a description of a sequence where the sampling apparatus 1 is seen in three different positions in cross-sectional views.
  • the apparatus is shown schematically why various elements, as e.g. the actuators 3, 5, are not shown.
  • the sampling cup 6 is shown in extended position into the channel 9, which is here shown as a channel section with flanges 13 for bolt mounting in a channel, where the hole 7 is made with conical geometry and with an opening upwards and which is therefore filled with the product 8 flowing in the channel 9.
  • the sampling cup 6 is withdrawn into the apparatus 1 for determining physical conditions of the product, e.g. determining weight by means of a not shown weighing cell 2 in relation to the specific volume in the sampling cup 6.
  • Other conditions at the product 8, e.g. water content, may also be determined in the apparatus 1, e.g. by photocells, microwave technique or other methods.
  • FIG. 2.3 is seen how the sampling cup 6 is displaced into the channel 9 and where the part itself of the sampling cup 6 with the hole 7 are displaced in relation to the arm 4 that otherwise forms the bottom in the sampling cup 6.
  • emptying of the product 8 which has just been examined occurs, and subsequently a flowing through the hole 7 of the flowing products 8 occurs in the channel 9.
  • This cleaning process may in principle be compared with a "shot blasting" of an item, where the "shot” is here constituted by the product flow 8.
  • Fig. 3 is shown four different cup designs which have been tested in a production of dog feed:
  • Diameter of feed ⁇ l8.2 mm
  • Thickness of feed 10.4 mm

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  • General Physics & Mathematics (AREA)
  • Physics & Mathematics (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Biochemistry (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Hydrology & Water Resources (AREA)
  • Sampling And Sample Adjustment (AREA)
  • Measurement Of Radiation (AREA)

Abstract

L'invention concerne un dispositif et un procédé d'échantillonnage d'un flux de produits, l'échantillonnage étant mis en oevre en continu et le produit étant recueilli dans une coupelle afin de déterminer des conditions physiques, telles que par exemple le poids par rapport au volume, et la coupelle étant vidée à la fin de l'échantillonnage. Le dispositif de l'invention comporte au moins une coupelle d'échantillonnage, la coupelle étant pourvue d'une ouverture de remplissage présentant une section donnée, et une ouverture de vidage présentant une section différente, respectivement. Cette coupelle permet donc de vider le produit par un autre orifice que celui par lequel elle est remplie. Le dispositif de l'invention peut ainsi être conçu de manière simple et fiable, car il n'est pas nécessaire d'imprimer à la coupelle un mouvement de rotation pour la vider. De préférence, la coupelle d'échantillonnage se vide par l'ouverture du fond, et elle est nettoyée ultérieurement avec le fond ouvert. Le vidage de la coupelle est avantageusement mis en oevre dans le flux de produit, mais peut aussi se faire dans une conduite séparée prévue à cet effet.
PCT/DK2009/000018 2008-01-21 2009-01-21 Dispositif d'échantillonnage et procédé d'échantillonnage Ceased WO2009092378A2 (fr)

Priority Applications (4)

Application Number Priority Date Filing Date Title
DK09704005.9T DK2243015T3 (da) 2008-01-21 2009-01-21 Prøveudtagningsapparat samt fremgangsmåde til prøveudtagning
EP09704005A EP2243015B1 (fr) 2008-01-21 2009-01-21 Dispositif d'échantillonnage et procédé d'échantillonnage
US12/863,541 US8141418B2 (en) 2008-01-21 2009-01-21 Sampling apparatus and method for sampling
AT09704005T ATE520014T1 (de) 2008-01-21 2009-01-21 Probennahmevorrichtung und probennahmeverfahren

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DKPA200800076 2008-01-21
DKPA200800076 2008-01-21

Publications (2)

Publication Number Publication Date
WO2009092378A2 true WO2009092378A2 (fr) 2009-07-30
WO2009092378A3 WO2009092378A3 (fr) 2010-04-22

Family

ID=40901468

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/DK2009/000018 Ceased WO2009092378A2 (fr) 2008-01-21 2009-01-21 Dispositif d'échantillonnage et procédé d'échantillonnage

Country Status (5)

Country Link
US (1) US8141418B2 (fr)
EP (1) EP2243015B1 (fr)
AT (1) ATE520014T1 (fr)
DK (1) DK2243015T3 (fr)
WO (1) WO2009092378A2 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2012083966A1 (fr) 2010-12-21 2012-06-28 Source Technology Aps Appareil d'échantillonnage en ligne et procédé pour échantillonnage en ligne
FR3010519A1 (fr) * 2013-09-09 2015-03-13 Terrena Dispositif pour la mesure de la masse volumique d'un produit en vrac, et installation de chargement de produit comportant un tel dispositif
EP4098992A1 (fr) 2021-06-02 2022-12-07 Atline ApS Appareil d'échantillonnage et utilisation d'un appareil d'échantillonnage
WO2023247240A1 (fr) 2022-06-22 2023-12-28 Atline Aps Système de production avec spectromètre à infrarouge proche

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Publication number Priority date Publication date Assignee Title
JP5751866B2 (ja) * 2011-03-03 2015-07-22 三菱重工業株式会社 容器内充填物検査装置、及び充填物充填装置
CN104677684B (zh) * 2015-03-19 2017-10-31 山东钢铁股份有限公司 一种熔剂取样装置及方法
JP6879942B2 (ja) * 2015-06-09 2021-06-02 ゲーエーアー プロセス エンジニアリング アクティーゼルスカブ 爆発性環境用のサンプリング装置、かかるサンプリング装置を備える乾燥機、及び、サンプルの流動性推定方法
CN108946026B (zh) * 2018-08-28 2025-09-12 河南省德耀节能科技股份有限公司 物料输送系统及其自动取样装置
CN113075351B (zh) * 2020-01-03 2023-08-25 应急管理部化学品登记中心 固体氧化性测试装置、测试方法及其取样器
CN115791643A (zh) * 2022-11-30 2023-03-14 山东钢铁股份有限公司 一种铁前原料场铁矿粉在线料种辨识装置

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DE19909437A1 (de) 1999-03-04 2000-09-14 Bayer Ag Vorrichtung und Verfahren zum Ermitteln des Schüttgewichtes von rieselfähigem Gut

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US3156120A (en) * 1962-05-16 1964-11-10 Mitchell J Kowynia Automatic sampling system
US3782200A (en) * 1972-11-24 1974-01-01 Moorman Mfg Co Sampler
US5563384A (en) * 1994-03-28 1996-10-08 Iii Sigma Company Bulk density sampler apparatus
AU2001293092B2 (en) * 2000-09-25 2006-07-27 Southern Research Institute Particulate and process gas stream sampler

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19909437A1 (de) 1999-03-04 2000-09-14 Bayer Ag Vorrichtung und Verfahren zum Ermitteln des Schüttgewichtes von rieselfähigem Gut

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2012083966A1 (fr) 2010-12-21 2012-06-28 Source Technology Aps Appareil d'échantillonnage en ligne et procédé pour échantillonnage en ligne
FR3010519A1 (fr) * 2013-09-09 2015-03-13 Terrena Dispositif pour la mesure de la masse volumique d'un produit en vrac, et installation de chargement de produit comportant un tel dispositif
EP4098992A1 (fr) 2021-06-02 2022-12-07 Atline ApS Appareil d'échantillonnage et utilisation d'un appareil d'échantillonnage
US12529626B2 (en) 2021-06-02 2026-01-20 Atline Aps Sampling apparatus and use of a sampling apparatus
WO2023247240A1 (fr) 2022-06-22 2023-12-28 Atline Aps Système de production avec spectromètre à infrarouge proche

Also Published As

Publication number Publication date
US20100288040A1 (en) 2010-11-18
EP2243015A2 (fr) 2010-10-27
WO2009092378A3 (fr) 2010-04-22
DK2243015T3 (da) 2011-11-21
EP2243015B1 (fr) 2011-08-10
US8141418B2 (en) 2012-03-27
ATE520014T1 (de) 2011-08-15

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